Tumbling mill



Oct. 10, 1933. .5, W BENSON 1,929,546

TUMBLI NG MI LL Filed-Sep?. l, 1931 2 Sheets-Sheet 1 ,65' 27 L5 ATTORNEY Oct. 1'0, 1933.

E. w. BENSON TUMBLING MILL Filed Sept. l, 1931 2 Sheets-Sheet 2 ATTORNE'Y Q castings due to'the fact UNITED ,STATES PATENT crrlfc's 'rUMBLING MILL Edward W. Benson, Romulus, Mich.

Application Septemb 3 Claims.

I This invention; relates to tumbling mills and the object of the invention is to provide a tumbling mill in which the ycastingsare secured in position in the mill and are' Heretofore it has bling mills to place the tumble the castings jacks until they areV clean butr sults in a considerable that rotated 'about a common axis while being cleaned v been the practice in tum* castings in the mill and' about' with,v the tumbling this method reloss of otherwise perfect the castings in bumping together become vcracked or broken or important lugs or flanges are knocked oif vWith my tumbling mill the castingsvare earch secured rmly'to a central support andare .ro-

tated about a common axis Whileithe jacks are and through the free lto move about, between,

castings to clean the castings and at the same time, there is` no opportunityfor loss by breakage due to the castings gether. v f` tumbling and bumping to= One of? the objects of my invention is to pro'-` vide a simple andy efhcient means vfor locking the castings in placein the m Another obj ect` anV arrangement whereby placed on the locking means of the mill. A further object a tumbling mill in whichl the ill whereby theyVV are held in position during rotation.

of the invention is 5to provid .a tension may V.be from -Vthe exterior of the invention is to provide castings may .be

turned about within 'the housing without moving the housing andin' -be locked to rotate which the housing may with the'castings.

- These 'objects' and the several novel features of the invention are hereinafte scribed and claimed and the construction by which these obj vis shown in theV accompanying drawings inI Which- Fig. 1 y bodying my invention the construction.

r more fully depreferred form of ects are attained is an end View of a tumbling mill em- ,I partly in section to show Fig. 2 'is a longitudinal section therethrough Ytaken on line A-A of Fig. 1. Fig. 3 is a section taken on une B-B of Fig. 2.

. Y The device is supported in a pair of rbearing members 1 and 2 shown in Fig. 2 in which a bushingS .is provided within which the members 4 are rotatably mounted.l Each member 4 is provided with an `annular flange Athe annular ange 5 byv bolts 6 which is in periphery of the drumhead 7 i 5 and secured to is a drumhead 7 disc form. Secured to the outer s the cylindricall -of handles vsecured in place by provided which ,drumhead The er 1,1931. Serial No. 560,604

body 8 of the tumbling drum which is provided with a removable cover 9 shownin Figs. 1, 2 and 3 which is normally heldin place by the bolts .10. This removable lid 9 is provided with a pair 11 by Which the after the bolts 10 have been removed. Rotatably mounted on the inner end of each member 4 is' a ring 12 which is provided with eight hat faces arranged to receive the eight flat plates 13v as will be understood from Figs. 1 and v2.1Eachflat 65 plate 13 is provided'V with strengthening ribsv 14 and a segmental flange 15 shown in Figs. 1 and 2A is provided at each end of each plate 13 and is the bolts 16 shown in Figs.

the respective 70 1 and 3 which extend throughv v plate and secure rthe plates to the members v12. These Vflanges l5 are curved at the edgeso as to form a complete circle when assembled togetherA as shown in Fig. 3 and a guard member 17 isv n is secured to thedrumhead 'land 75 engages over and provides a cover for the anges 15at each end of the device. l

In order to lock the member 12 and flat plates 13 to the drumhead, a Vlocking bar 18 is provided at each end of the device as-shown in Fig. 2, which carries'a bolt 19 extending through an aperture 20 provided in each -drumhead'and the lower end of this locking bar is adapted to engage in a notch 21' provided therefor in the member 12. There are eight oi these notches 21 85 provided in the eight flat faces of the member 12 so rthat the drum may be locked to rotate with the castings in any one of eight positions. When these locking bars are moved to the position shown in Fig. 2, the drum is locked to the member 12 and plates 13 and when the locking bars 18 are raised to the upper ends of the slots' 20, the

vmembers 12'and'plates 13 may be rotated in rin Fig. 2 or in any rother suitable manner and this gear may be provided lwith a spider having a series of four or iive spokes so secured to the gear 22 being secured to the drumhead provides a means for driving the tumbling mill by meansof a pinion meshing with the said gear 22 (though not here shown).

On the outside, eachplate 13 is provided with 195' a series of transverse ribs 24 shown more particularly in Fig. 1 and adjacent each rib is an opening 25 vthrough which a hook 26 extends. Each plate 13 on the underside is provided with a series of bossesro27 on each of whicha bell 110;

lid may be removed CII n vrow of castings, the neXt row lat which time,

crank lever 28 is pivotally mounted. Each hook 26 is pivotally mounted on its bell crank lever 23 and to the lower or depending end of the bell crank lever` one end of a stiff .spring 29 is secured.

The opposite end of each spring 29 is connected toa longitudinal rod 30 which extends through the center of the mill and one rod is provided beneath each plate 13,. To the end of each rod 30, a lever 31 is pivotally connected which in turn is pivotally mounted at 32 between bosses 33 provided on the end plate 3e which is rotatable on the member 4 as will be understood from the left end of Fig. 2. When the respective lever 31 is pulled outwardly as shown in the lower half of Fig. 2, the bell cranks 28 are all turned on their pivots to raise the hooks 26 as shown. While in this position, castings such as cylinder blocks 35 shown in Fig. 2 are positioned on the transverse ribs 24 of the plates lf3 and the hooks 26 are engaged over adjacent portions of the castings, the hooks being designed for the particular type or" casting with which the tumbling mill is used. After the hooks have been engaged over the cylinder walls as shown, the lever 31 may be turned to the position shown in the upper half of Fig. 2 and a hook 35 may be engaged thereover tol hold it in place. This movementiof the lever 31 draws the bar or rod 30 longitudinally to the left oi Fig. 2 thus turning the bell cranks 28 by means 'of the springs 29 so that the hooks 26 arewdrawn into tight' engagement with the cylinder wallsto hold the same tightly against the ribs-24 on the plates 13.

This tumbling mill is for use in cleaning rough castings as hereinbefore described and the mill is preferably iilled with a large quantity of tumbling jacks. After the tumbling jacks have been thrown into the mill,l the mill is rotated by means of the gear 22 so that the jacks fall over and pass between and through the castings to clean the same and in this connection it will be noted that the shields 17 prevent the jacks from wearing off the heads of the bolts 6, 16 and 23.

When rotation has been continued to complete the cleaning operation, the lid 9 may be removed and the mill may be slowly turned over to discharge the jacks and foreign matter from. the mill. When all loose jacks and foreignrnatter have'been discharged from the mill, the mill may be turned so that the opening is at the top the lever 3l may be turned to release the hooks 26 for the row of castings appearing through the opening in the drum at -which time, the castings may be removed one at a time and replaced by a K new casting to be cleaned whereupon the hooks may be engaged Aover the new castingsand the lever 31 turned to place a pressure on the hooks and secure the castingsv in place. At this time the locking bars 18 may be moved outwardly to disengagefthe same from the notches 21 and the bearing members 12'to free the drum from the casting supports. By means of a bar engaged in the next turned to position beneath the opening in the drum'and by releasing the lever 31 the next row of castings may be removed and replaced `by other castings to be the mill may be unloaded and loaded at the same time and when completely loaded the jacks may be'thrown into the drum and the lid replaced at which time, the mill is,` ready for the next operation. In unloading the mill if any casting vnoted that the rods 30 are Vpivotally mounted on cleaned. In this manner,

is found to need further cleaning, it may be left in place and 1re-secured with the other castings in its row by turning the lever 31 to place a pressure on the hooks 26. One of the Vfeatures of the device is that each `plate 13 as a unitwith its hooks, bell cranks,springsand rods 30, may

fdraw air through the center of the mill and tol removeiali dust and sand particlespassing into the compartment for the rods 30. It will be not at any point positively connected to the-,bell cranks 28 but the connection is entirely through means of springs 29 which are Vconnected to the rods 30 so that' the castings in position.

a tension isjput on the leverage to cause hooks 26 to Virmly hold the l'n the present such as cylinder blocksQare positioned loosely in the mill and during rotation of the mill become wedged in place, preventing the desired movement of the jacks in cleaning andy requiring con'- siderable time in dislodging the key cylinder before unloading themill.` With thismethod also, the breakage of the castings by using force to dislodeethe castings and by the castings bump# nsteach other causes considerable loss. With my device the castings are supportedl in fixed position to allow free movement of the jacks at all timesV andl when unloading, any casting not properly cleaned may be left in position for the next operation of the mill. By providing spring means for actuating the hooks, a variation. of thickness of the castings may-be allowed and at Vthe saine time7 the'castings will be firmly held in position. With my device any `number of castings up to twenty-four may be cleaned in the mill asit is not necessary to put in a full loadfof castings'asis necessarywith present typesof tumbling mills, i

lFrom the foregoing description, it becomes evident that the deviceis very' simple and ei.- cient in operationwill .not easily get out of order, is composed of few parts and is oficonsequent low manufacturing cost and provides a device which accomplishes the objects described. Having Athus fully described my invention, its utility and mode of operation, whatiI claim and desire to secure by Letters Patent of the United series of castings thereon, a series Aof hooks exi tending through each member and arranged to engage the castings, a bell crank foreach hook the respective member and turnable to put a tension on the respective hook, yieldable means connected to each bell crank and a rod for each member connected to the bell cranks thereon andradapted `to be longitypes oi tumbling mills, castings,

vno

tudinally .moved to place a tension on the bell cranks and hooks.

2. a tumbling mill, a drum, a member mounted within the drum and normally rotatu able therewith and arranged to receive a series of castings thereon, a series of hook members for engagingr the castings, aflever for placing a pressure on each hook member and a series of springs connected ranged to be placed under tension from the ex-` to the said lei/ers vand arterior of Jone drum. l

3. In a tumbling mill, a drum, means or rotating the drum, normally secured a member Within the drum and to rotate with the drnm, Athe cranks.

EDWARD W. BENSON. 

